I've recently moved into a year 2000 vintage house filled with such trendy tech as phone jacks and coax cable in most every room. Being me, I set to pulling Cat 7 Ethernet to every corner I could reach. But there were many corners I couldn't reach, and I despaired of getting the coverage I wanted.
Then I took notice of the one Ethernet jack in the house—in a basement media room, and that its cable ended up terminating in a grey box under the stairs.
|Bell Atlantic Network Interface Device|
and there were many grey wires, printed with "Cat5," ending up at the same box. But where were they going, there were no more Ethernet jacks in the house. I'd searched. And then understanding came, I unscrewed all the phone jacks in the house. And with the exception of one, they were all wired to use a single pair out of a standard four pair Cat 5 Ethernet cable. 20 years back someone had seen the future and pre-stocked my house with the makings of fast wired networking.
|My Collection of Phone Ports|
At the other end, I neatly punched each cable and attached it to a managed Ubiquiti switch.
|Repurposed Phone Lines|
Now you might think that Cat 5 would be slow, but for short lengths, in non-challenging environments it works fine without the shielding enhancements of later standards. My managed switch lists all but one as working at 1000 megabit full duplex, and the other one at 100 megabit full duplex. Even 100 megabit is adequate for streaming 4K iTunes video. I pulled Cat 7 in the attic because I never want to do it again, not because my current needs wouldn't be met by Cat 5e—or in a pinch by this existing Cat 5.
|Detective Work finding the lost Phone Line|
I cut a hole in that wall, and neatly stapled to a stud was the last lost Cat 5 in a perfect place for an access point, and a great central location for a Lutron smart switch hub. It would have been unacceptable wall butchery to get an Ethernet cable there through finished ceiling and walls, but 20 years ago somebody left me a present.
|Ubiquiti in-wall access point|
Lutron Caseta Hub